<template>
  <div id="app" class="app-container">
      <!-- Header组件 -->
      <mt-header fixed title="黑马程序员">
          <span slot="left" @click="goBack" v-show="flag">
              <mt-button icon="back">返回</mt-button>
          </span>
      </mt-header>


      <!-- 内容区域 -->
      <transition>
          <router-view></router-view>
      </transition>


      <!-- tapbar组件 -->
      <nav class="mui-bar mui-bar-tab">
          <router-link class="mui-tab-item-llb" to="/home">
              <span class="mui-icon mui-icon-home"></span>
              <span class="mui-tab-label">首页</span>
          </router-link>
          <router-link class="mui-tab-item-llb" to="/centre">
              <span class="mui-icon mui-icon-contact"></span>
              <span class="mui-tab-label">会员</span>
          </router-link>
          <router-link class="mui-tab-item-llb" to="/shopCar">
              <span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="J-badge">{{ $store.getters.getAllCount }}</span></span>
              <span class="mui-tab-label">购物车</span>
          </router-link>
          <router-link class="mui-tab-item-llb" to="/search">
              <span class="mui-icon mui-icon-search"></span>
              <span class="mui-tab-label">搜索</span>
          </router-link>
      </nav>
  </div>
</template>

<script>

export default {
    name: 'App',
    data(){
        return {
            flag: false
        }
    },
    created(){
        this.flag = this.$route.path === '/home' ? false: true;
    },
    methods:{
        goBack(){
            this.$router.go(-1);
        }
    },
    watch:{
        '$route.path': function(newVal){
            if(newVal === '/home'){
                this.flag = false;
            }else {
                this.flag = true;
            }
        }
    }
}
</script>

<style lang="scss" scoped>

    .app-container {
        padding-top: 40px;
        padding-bottom: 50px;
        overflow-x: hidden;
    }
    .v-enter {
        opacity: 0;
        transform: translateX(100%);
    }
    .v-leave-to {
        opacity: 0;
        transform: translateX(-100%);
        position: absolute;
    }

    .v-enter-active,
    .v-leave-active {
        transition: all .5s ease;
    }
</style>

